Step into any rectangular room, select two parallel walls to hold portals with movable handles which are both at the same height. Control an endless-traveling ball, aiming to guide it through a ring that moves back and forth parallel to the walls. Utilize portal hoops to teleport the ball strategically and increase your score by getting it through the hoop. With a 1-minute time limit, anticipate the ring's movement and showcase your skills to achieve a high score.

NOTE: You need a box shaped room setup for playing this game.